Machine for automatically setting and truing the ends of the teeth of saws



Nov.'7, 1950 v A. VIGNEAU 2,528,925

MACHINE FOR AUTOMATICALLY SETTING AND TRUING v THE ENDS OF THE TEETH OFSAWS Filed Jan. 8, 1946 6 Sheets-Sheet 1 FIG. 1

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Nov. 7. 1950 A. VIGNEAU MACHINE FOR AUTOMATICALLY SETTING AND TRUING THEENDS OF THE TEETH 0F SAWS GSheets-Sheet 2 Filed Jan. s, 1946 Nov. 7,1950 I A. VIGNEAU 2,528,925

MACHINE FOR AUTOMATICALLY SETTING AND TRUING v THE ENDS OF THE TEETH 0FSAWS Filed Jan. 8, 1946 6 Sheets-Sheet 3 FIG .3

Nov. 7, 1950 A. VIGNEAU 2,528,925

MACHINE FOR AUTOMATICALLY SETTING AND TRUING THE ENDS OF THE TEETH 0FSAWS Filed Jan. 8, 1946 6 Sheets-Sheet 4 d w I I m 22 k 2 h \\(D l. ln Ap q 3 P y m & m '4 5 m V v I O In n wmfiz:

Nov. 7, 1950 A vlGNEAU 2,528,925

MACHINE FOR AUTOMATICALLY SETTING AND TRUING THE ENDS OF THE TEETH 0FSAWS Filed Jan. 8, 1946 6 Sheets-Sheet 5 l @Wlz Nov. 7, 1950 A. VIGNEAU2,528,925 MACHINE FOR AUTOMATICALLY SETTING AND mums THE ENDS OF THETEETH 0F SAWS Filed Jan. 8, 1946 6 Sheets-Sheet 6 o o o E (9 PatentedNov. 7, 1950 MACHINE FOR AUTOMATICALLY SETTING AND TRUING THE ENDS OFTHE TEETH OF SAWS Andr Vigneau, Norrois, France Application January 8,1946, Serial No. 639,762 In France December 2'7, 1944 20 Claims.

1 1 It is known that for giving clearance to band saws (or other likesaws) it is customaryto set, that is to say to spread, in thetransversedirection, the end of the saw teeth, and then to true them, that is tosay, to calibrate this spreading of the teeth in such a manner that allthe teeth give, owing to their substantially identical shape, a uniformclearance for the blade to pass.

The set is generally effected by means of an eccentric (a cam-likepivoting tool of special shape) which engages the underside (front partof the end) of the tooth of which the back bears on a small'anvil. r

' Hitherto, the setting apparatus was moved, either by hand, tooth bytooth, along the stationary blade, or was given a reciprocating motionof retraction (in automatic machines) in order to enable the movable sawblade to be fed forwards.

Whatever may be the type of apparatus machine for setting and' truing(calibrating).

at each'cycle of operation and, on the other hand a truingdevice whichcan move in the longitudinal and vertical directions so as to placeitself in the correct position relatively to the tooth to be trued, sothat small differences in the set of the saw teeth or inaccuracies ofadjustment are compensated.

Means are provided for automatically bringing the blade (preferably withan arcuate motion) into the correct position, so that the tooth to beset comes into the exact position (vertically and longitudinally)between the setting cam and the anvil. Means are furthermore providedfor automatically obtaining from a single control the forward feeding ofthe saw blade, its (arcuate) upward and downward movements, the settingand the truing of the teeth.

The various characteristics of the novel machine will become apparentfrom the ensui'ng description which relates V to a constructionalexample shown diagrammatically and nonlimitatively-in the accompanyingdrawing in whichr l;

Fig. 1 isa-plan view of the. machine; Fig. 2 is a vertical sectionthereof along the line 11-11 (axis of the .saw blade) of Fig. 1;

Fig. 3 is a vertical section, substantially along the line III-III ofFig. 1, of the setting device; Fig. 4 is a vertical section,substantially alon the line IV--IV of Fig. 1 of the truing (calibrating)device;

Fig. 5 is a partial vertical section of the ma.- chine along the lineV--V of Fig. 1;

Fig. 6 is a similar view to Fig. 5, the members shown being however inanother position;

, Figs. 7, 3 and 9 are respectively sections taken along the linesVIIVII, VIII-VIII and IXIX of Fig. 1, the object of these sections beingsimply to show the respective positions'of the various actuatin membersof the machine; Figs. 10 and 11 show two differentpositions o thelocking fingers of a group of actuating members of the machine;

Finally, Fig. 12 is a perspective view of a portion of a saw blade, onepart of the teeth of which are of normal shape, whereas another part ofthe teeth hasbeen subjected to the setting and truing or calibratingoperations.

.As canbe seen in this latter figure, the result to be obtained is thesetting and, consequently, the transverse and suitably truedspreading ofthe end of the teeth of a saw, the blade of which is designated by A,the normal teeth by B and the teeth which have been set and trued by C.

The machine which can do the work referred to above and which is shownin Figs. 1 to '11, comprises a blade-holder I, which is adapted to moveon guides 2 which are secured to the frame 3 of the machine and whichsupport the. saw

"blade A whose movements are braked by two vertically adjustable leafsprings 4, the pressure of which can be adjusted by means of screwscontrolled by knurled knobs 5.

The blade-holder I, which is adjustable in the vertical direction (inorder to enable it to be adapted to different widths of blades), ismounted on an adjusting screw 6 controlled by a knob I and engagedin'two stub-shafts 8 and 9 which are journalled respectively in cranksl0 and H, so that an articulated parallelogram ab-c-d is obtained.

In the inoperative position of the blade-holder l (low position shown-in Fig. 2), the lower end 3 of the screw 6 rests on an adjustable stop12 fitted on the frame 1. I

The shaft 9 of the upper crank II, which is the actuating crank fixed onan actuating shaft I 3, enables the smooth upper portion of the screw Iclockwise direction) causes the blade-holder I to move in such a mannerthat, for the setting and truing operations, the blade takes up theposition designated by A in the drawing Before the upward movement oftheJbladeA 4 minates in a hexagon on which is fitted an actuating leverwhich will be referred to hereinafter. The swinging of the cam 34 in aclockwise direction produces the setting of a tooth at each cycle of themachine, The truing (or calibration) of the teeth which have been set,in the dejl'ie-fi'istd's oribed, is produced by the pressing of thetooth Between two conical shaped dies. For the truing to be accurate, itis necessary that the end of the tooth should always be located in thesame position in the die In the machine which is the object of theinvention, as the truing apparatus does not calibrate the tooth which isbeing set but one of the subsequent teeth, account has to be taken ofthe I takes place, said blade is moved one tooth in the I direction ofthe arrow F, by means of a finger l5" carried bya pusher I6 adjustablypivoted at i! on arrives I 8"-'fi'-Xed oi-r a ensg shaft Hl journalledin' the fra'ine" of the machine, and'actu'ated in the manne which"'wil-lbe' described ne' einafter.-- Saidfpusher'feeds' the tooth whichis to be set (and not the pre'cedi-ng tooth-)y this being so that-:thedifferences of spacing of: the teeth do 'notafiect the engagement of thetooth in the setting de ice. a

7 The useful travel tforward feeding ofth'e defined by meansofan'adjustable stop sorwjfl.

The settingdevice (Figs f'l, 2 and 3) co mprises a settihg fievioe bodyli havi'r'igtherein a slit 22' :fqr heh 'iblei eiress; ei p ss i?'adjustthe angular position of said body in a support 23 "secured-to-thefrfam e o f the machine and to 12:61: said bod ih said Support byfnean's ad ustable Jam/ n 2 5 intended to support the back of the --toothduring; the setting ;-ope rati'on'. The tooth subjectedto the settingoperation is held iatfmna r ri hetvansverse direction (theblade liavihgpreviously-"been brought into-the position A15)? p'y'means oi a -fix'edbut auiustabie aia plate ZS and Of a tie 21 {adjustably- 'engagd in astub-shaft- 28 journalledin thefbod'y 21' and carrying aspecial: helicalslop'e iil. min-e body 2 L is: alsomounted an adjustable clutchmember 30which" is locked therein'bymeans of a screw 31. said ciu'tch memb rcarries a s' ecmrs ope which corresponds; to th'e -slope 2 9 or thestubshaft 28; and which impart's' a veryfrapid movem nt te thestub-shaftdn question during a fractionofits revolutiom 'then a slow butpowerful *move'inentduringlthe complement of its rotation. A retracting.spring? 32 ensures the'contact between the slopes of: the two members:28v andr3ll. The rotation of the stub-shaft 2&.=isi effectedrgby of theplay or is closed. by; an assembly plate .45; arid 1 possibledifferences of spacing and of height which may occur in the teeth ofsaws, and also of the bending of the blade-supporfile v eo 'di n plt e'lvn ibe mam? provided so thatthe tooth to b' trued is airways'aiiratei] deed in th w ns.- i i- The r nef l vil penetrates the e2'6'.of,,aj screw 41 w adjustable ma. stubrshaft lfi on .,Qhich likedthe. controllever 49, whic'h is a'ctuated by aborine'cting rod providedwitha ja'dju'stingg rooiie inwhichcan be. locked thej crank 51Lcarriedby the lever Q;9, sa id connecting; rod being, controlled bymeans whichwill be described, hereinafter. Th s uh h i sg f 1 52 with aStopL Said, slope Ico operat corresponding: slope ofia'n adjustable cluch mern here-ii, clamped in the body .35, by ,means' of 'a screw; 54,. Aretracting spring '55 ensure p 'manentjcontact between the afo saidslopes; j the arm 49' of the lever. is, attached one end of a retractingspring 56' of which theother egridi's attached, through the'iiit'er'ine.mi of a finger meansziof:a;leverg33g theicontrol of 'whichisobtained'byia mechanism which will-be referred to hereinafter. .J 1 s I 1 1Whenithe,l'ever 33Iswings (Fig- 2) in a clockwisejdi-rection, the actionof the-slope 29 effects the transverse; clamping ofthetooth tobe: set

between the fixeddie-plate 26-. and the die: 2] which is pushed toward's.thelatterowing to the axial movement of the shaft 28;

The setting proper o .lt he toot l i is' obtainedby hereinafter.- I I51,- to thebo'dytf ofthe truingdevice. I

he, body. carries, furthermore; wearin plate 58, the function of whichwill beapp'a'rjent synchronisrn with the settinghdevilce previ I Idescribed, and in the followih lfiianiier, itsQ b irig rememberedthatthesawteethlocate bforethe truing device (on .the'..1eft o'flthe,tru1ng. -devi'ce in Figs, .1 and 2) have already undergo the settingoperation by the settingdeyicefwhieh'pr cedes the truing device (in thedirection of feed of the blade). and which hasbeendescribedhereinbefore. It should also berernemb'er'ed'tha't'the body35 of the -truing or calibratingdevice can .effect'two .m'oveinents,viz. a. s ingingmmimjfit about the'shaft as anua-i longitudinal'movementon the horizontal guide 38. I I

By means of the adjusting groove provided in the connecting rod 58, thetruing apparatus is 'so' placed-tha't, when the'blad'e A isin the raisedposition A, the lower assembly finger 43 isre- 'trac'ted'fr'om theunderside of the tooth a distance -of 1 cm. for example. -When the bladetakes up the position A, the -end of the tooth D lifts, through theintrumentality of the plate 58, the body of the truing device whichswings about the shaft 36. The truing-device is thus placed. in itscorrect position vertically.

When the connecting rod 58 exerts a thrust (towards the right in Figs. 1and 2) on the lever 49=said lever, which is first of all held stationaryby thespring 56, cannot swing with the stub-shaft 48 in the body 35 andthe whole truing device moves towards the right (Figs. 1 and 2) on theslide 31 until the finger 43 abuts against the underside of the tooth tobe trued. At this instant,

the whole truing device can no longer move to-- wards theright and, asthe connecting rod 58 continues to urge the lever 49, said leverovercomes -the pull exerted by the spring 58 and swings with thestub-shaft 48. By-the action of the slopes, the shaft 48 and,consequently, the screw 41 move towards the right (Fig. 4) and theaforesaid screw pushes the movable truing die 48 towards the dieplate4|. This pressing movement produces the truing of the-tooth.

When the connecting rod 58 returns to its starting position, it effectsthe release or separation of the die 48 and. the die-plate 4| until theslope 52 abuts against its stop. At this instant, as the return strikeof the connecting rod 50 is not completed, the endof the return stroke.of 'the connectingrod in question returns thetruing 4 apparatus to itsstarting position (toward the left in Figs. 1 and 2). v a

I The operations of. automatic feeding of I the saw blade (at thebeginning of each cycle of the -machine), of raising the blade-support,of setting, of truing of' the saw teeth and of lowering the blade:(atthe .end of each. cycle) are effected by a'single control mechanism.

1 Thiszmechanism comprises a worm, 58 (Fig. 5) fixed on;a shaft 6|journalledin two bearings 82 and 63 fixed to the frame 3, one end ofsaid shaft .carrying a loose pulley 64 and a fixed pulley 65 .on whichis mounted a crank handle 68.

The worm 68 meshes with a spiral gear 61 fixed von a shaft 68 journalledinbearings 69 and 18 of the frame 3, The shaft 68 carries (Figs, 1 andNa, lifting cam 1I associated with a lever 12 carrying a roller 12'..The'cam 1I co-operates with aroller 13 carried by a lever 14 fixed onthe shaft I3 controlling the parallelogram (ab.-c-d) for lifting theblade-support .I. The roller supportingulever 12 co-operates with alever 15 fixed on the shaft I9 ofthe lever. I8 controlling the feed ofthe saw blade Anfarm 16, also fixed on the shaft I9, is subjected to theaction of a. retracting spring "attached to the frame 30f the machine.It will be seen that at eachcomplete rotation of the shaft 88 (whichrotation corresponds *toa 'cycle of operation of the machine),.theblade-holder I is periodically raised and lowered (through theinstrumentality of the members 1|, '13, 14,- I3, II, I8,-6). Thismovement of the blade holder is synchronised with that of the P pusherfinger I5 (which is actuated through'the members 12, 12, 15, 16, 11, I9,I8, I8).

One'of the faces of the spiral gear 61 is provided with a "drum 1,8. theperiphery of, which carries an unlocking projection 19 and theirsprojection 19 of the drum 18 and, on the other hand; with an adjustablestop screw 81, the free end ,of which co-operates with the smoothzpe-:"riphery of the aforesaid drum 18. At the opposite end, the sleeve B2issecured to a resilient actuating lever 88 (Figs. 1 and 8) which actu-';ates, through the intermediary vof a compression spring 89, anintermediate lever QDadapted to rotate loosely on the sleeve 82; Theintermediatelever 98 is connected to one end of a connectingrodt 9|, theother end of which is 'con- .nected to the actuating 'lever 33 of thesetting device.

Before the operations of setting andof' 'truing take place,.the'blade'is' clamped in the setting device owing to the swinging(in-an'anti-"clock- 'wise direction) of the lever8l (by the action of;the:roller 88) with the sleeve82, the'ilever-88 and the intermediatelever98 and to the translator 5movement ofthe coupling rod 9I.-' Afterthe setting and truing operations, all the members are brought into theunlocking position (Fig. 6) owing to the projection 19 encountering theheel 86, thereby moving back the unlocking lever 85 and swinging theclevis84 in a clockwise direction. The escapement between the heel 86(carried by the lever 85) and the projection 19 is adjusted-by means ofthe screw/-81 (Fig.6). The holdingof the membersin' the unlockedposition is effected by a finger 92 "which is secured to the lever 88and-which co-operates with a leaf-spring 93 fixed to the frame of the-machine (Figs. 1, 10 and 11);

The actuation of the setting device and of the truing device is effectedby a roller 94 mounted on the spiral gear 61, on the opposite sideof thedrum 18. Said roller co-operates with anactuating lever 95 fixed bymeans of a screw 98 on the shaft '83, one end of which carries a finger91 co-operating with a stop 98 and with a retaining leaf-spring 99 fixedto the frame 3. The

' lever 95 carries, furthermore, an arm I88 fitted "actuating the truingdevice.

" with a stop screw IOI co-operating (during the return movement) withan ear I82 secured to the clevis 84. a

O'nethe shaft 83 is fixed a lever I83 (Fig. 1) connected to :one end ofthe connecting rod 50 Finally, at its free end, the shaft 83 carries aclevis-shaped lever I84 in which can slide a clutch 'pin'185' normallyengaging a quadrant I06 of a lever I01 thereby securing said lever I81to the "shaft 83. The lever I81 is pivoted to a slider I08 (Fig. 9)which can be adjusted in the groove 65' I89 of a coupling rod: II8 whichit -controls resiliently. Said coupling rod is connected at III to a'lever I I2 engaged on the hexagon of the setting cam 34. Thelever ;I I2is locked on-the cam 34; When the cam portion of the latter is deformedby the work, said cam can move transversely and'is held in the chosenposition by pro vided in the body of thelever .I I2

Itwill be appreciated fromthe drawing that the various transmission andcontrol members are arranged, organized and fiXed in such a manner thatone complete revolutionsof the spiral gear 61: (whichrevolutioncorresponds. to, a cycle of operation of the. machine) effectsthe following sequence of operations: c

(1. (a) The pusher l feeds the blade of the saw an. amount equal to onesaw tooth;

' I('b) The pusher returns to its starting. point;

2; The blade-support 1 moves upwards and brings the saw from thep'ositionA to thef-position A. during which operation: o (a) The toothto be set'is placed between the cam 3.4 and the anvil i Y (b) The end ofthe teeth which has already been-set and which-is located under thetrui-ng -de vice-alifts same and places it in the correctv positionvertically; V, i o

3. The clamping mechanism,- provided in the setting device 2| clampsflnthe transverse direction, :thebl'ade which has'been brought into highposition; i

4., ,Ihecam 34 is actuatedand sets the tooth whichissupported'against'the anvil: v Simultaneously, the truingdev'ices35(raised to the correct height) moves the guide 38 until the stop 43 ofthe dies abuts against thetoo'th to: be true'd, at which instant thehelical slope 520i the truing device comes 'into aetion-,'therebycausing the tooth to'be calibrated between the die and the die-plate 41;

5-. )ALHQBI' .the setting and the truing operatioiis, 7

there simultaneously take place the uhlockin'gin the setting device '21and (through "the interl clamping of the truing dies 49 4i and return ofthe cam 34 to 'the'initial position;

The truing device then returns to its starting position;

H 6. The blade-support l -moves. down into its initial position, therebycausing:

. (a) The saw bladeto'move downwards'irom the position A to the positionA;

tb) The truing device 35 to move downwards "and bear against its stop39.

'I claim: V

1. A machine for' automatically setting and 1 truingitheteeth of bandsaws or the like comprising a frame, setting-means mounted 'on saidframe; means for supporting a sawbladepmeans for feeding said saw bladestep by step during each'operational cycle of the machine so that thesaw teeth are successively acted upon'by said setting means, truingmeans acting u on said 'teeth 'aft'er they have been set' by saidsetting means; and means controlled by the tooth'to be acted uponby saidtruing'means for-adjusting said truing'means; in the horizontalandvertical 13124-1165 so that said-truing means maybe automaticallycorrectly positioned with. respect to; the

vtooth to be trued.

2. A machine for automatically settin and V .trui-ng the'te'eth ofbandsaws or the like: comprisin-g'a frame, setting meansmounted on said""blade-curing the setting operation.

correctly positioned with respect to the tooth to be trued, said settingmeans comprising a body angdlarly adjustable relative to said frame hav-'ing a slot therein for the saw blade, an anvil for supporting the sawtooth duringthe setting thereof; a'cam for setting the tooth and meansautomatically. operated for locking the saw blade during the setting ofthe tooth.

3.-A machiiie for automatically setting and truing'the teeth of bandsaws or the like com prising aframe, setting means mounted on saidframe, means forasupportinga saw blade, means for feeding said'saw bladestep by step during each-operational cycle of the machine so that 'thesaw' teeth are successively acted upon by said -s'etti'ng means, truingmeans acting uponxsaid teeth'af'ter they have been set bysaid settingmeans, an'abutment located adjacent said setting means; a movable membercooperating with'said abutment for locking the satv blade during thesetting o eration, "said movable Vmember; having ahelieal inclinethereon, a cooperating helical inc'line-fixed relative to said-firstnamed helical inbli'n'e; and means for rotating said movable elein'entat predetermined periods so that said movable-member, due tothe'cooperating inclines, will cooperate with said abutment to lock saidsaw 4. A machine for automatically setting and truingthe'teeth of bandsaws'or the like comprising 'a frame, settiiig means mounted on saidframe, means for supporting a-saWblade/means *foi jfeeding said, sawblade step by stepduring each operational cycle of themachine's'o th'atthe 'sav'v teeth are successively acted uponby said "setting means,truing means acting upon .said

teeth after they have been set said setting means, said truing meansbeing located in aibod-y slidably ancl'pivotal-ly mountedand'compri'sing a fixed "die, a movabledie cooperating withs'aid fixeddie for truin'g' the tooth operated upon, and

j cam means operable during each operational cycle of the machi e rermovin'g aid movable die towards said fixed die.

5. A machine for automatically setting and truing the teeth of bandsawsbr vthelike-"comprising a framesetting means mounted onsaid frame,means for supporting a saw blade, means i for feedingsaidsa'w tbladestep by step during each operational cycle of theinachine so thatthe saw teeth are suc essiyay acted upon by said settingmeans, truingmeans acting upon said teth after they have been set by said'settingmean-s; meansior movingsaid supporting means into ahd'away fromthefpo'sitioninf which the setting and truing operationsare performed,said last pained. means comprising an articulated parallelogram movableat each operational cycle ofthefmachine.

'6; A rnachine for automatically setting'an'd truing the teeth of bandsaws or the like comp'rising'a frame, setting'njieans'm'ourited ohsaidframe, means for supporting-a: s w bladefmeafis 'for feeding said bladetep by step during each operational cycleof the machine sothat the sawteeth are successively acted upcnby said Setting means, tru'ir l'g In'eahs acting upon said teeth after they'hav'e been set by'sa'id settingmeans; means for moving said suppor ting. means into and away from theposition in which the setting and mining operations are erformed; saidlast named means comprising an articulated parallelogram, anoscillating-shaft oscillated at each operatidnalbycle'bf the machine and.9 connecting said oscillatingshaft with said articulated parallelogramso that said supporting means for said blade is moved intoand away fromsaid setting and truing means.

'7. A machine for automatically setting and truing the teeth of bandsaws or the like comprising a frame, setting means mounted on saidframe, means for supporting a saw blade, means for feeding said sawblade step by step during each operational cycle of the machine so thatthe saw teeth are successively acted upon by said setting means, truingmeans acting upon said teeth after they have been set by said settingmeans, means for locking said saw blade during the setting operation, adriving shaft, a worm fixed on said driving shaft, a spiral gear drivenby said worm, a drum mounted on one of the faces of said spiral gear,cam means upon said drum controlling the unlocking of said lockingmeans, a roller also mounted on said drum controlling the locking of,said locking means, and a second roller mounted upon the other face ofsaid spiral gear controlling said setting means.

8. A machine for automatically setting and truing the teeth of band sawsor the like comprising a frame, setting means mounted on said frame,means for supporting a saw blade, means for feeding said saw blade stepby step during each-operational cycle of the machine so that the sawteeth are successively acted upon by said setting means, truing meansacting upon said teeth after they have been set by said setting means,means for locking said saw blade during the setting operation, a drivingshaft, a worm fixed on said driving shaft, a spiral gear driven bysaidworm, a drum mounted on one of the faces of said spiral gear, cam meansupon said drum controlling the unlocking of said locking means, a rolleralso mounted on said drum controlling the locking of said locking means,and a rocking lever operable by said roller controlling the operation ofsaid truing means.

9. A-machine for automatically setting and truing the teeth of band sawsor the like comprising a frame, setting means mounted on said frame,means for supporting a saw blade, means for feeding said saw blade stepby step during each operational cycle of the machine so that the sawteeth are successively acted" upon by said setting means, truing meansacting'upon 'said teeth after they have been set by said setting means,means for moving said supporting means for said saw blade into and awayfrom said setting means and truing means, a driving shaft, a worm fixedon said driving shaft, a gear driven by said worm, a cam driven by saidgear, and means operated by said cam for operating said means for movingsaid supporting means for said saw blade.

10. A machine for automatically setting and truing the teeth of bandsaws or the like comprising a frame, setting means mounted on saidframe, truing means also mounted upon said frame, means for moving a sawblade into and away from said setting means and said truing means, meansfor feeding said saw blade step by step during each operational cycle ofthe machine so that the saw teeth are successively acted upon by saidsett ng means and said truing means, and. means for locking said sawblade during the setting and truing operations.

11. A machine for automatically setting and truing the teeth of bandsaws or the like comprising a frame, setting means mounted on saidframe, truing means also mounted upon said frame, means. for moving asaw bladeintoand away from said setting means-and'said truing means,means for feedingsaid saw,blade st ep by step during; each operationalcycle of the machine so that, the saw teeth are successively acted uponby, said ,setting -,means and said-tim n means, means for locking saidsawblade during the setting and truing operations, and cam meanscontrolling said locking means to actuate the intial movementof saidlocking means rapidly and the final locking movement at reduced speed.

12. A machinefor automaticallysetting and truing the teeth of band sawsor the likecomprising a frame, setting means mounted on said frame andfixedly positioned with respectto said frame during operation of themachine, means for supp rting a saw blade, means-forfeedin sad saw bladestep by step during each opera: tional cycle of the machine sothat thesaw-teeth are successively acted upon by said settingnleans, truingmeans acting upon said teeth afterthey have been set by said setting.means, and means controlled by the tooth to be acted upon by said truingmeans for adjusting said truing meansin the horizontal and verticalplanes so ,that said truing .means may be automatically :correctlypositioned with respect to the tooth; to be trued.

13. A, machine for automatically, setting and are successively actedupon by said settingmeans,

truing means acting upon said teeth after they have been set by saidsetting means, means controlled by the tooth to be acted upon by saidtruing'means for adjusting said truing means in the horizontal andvertical planes so that. said truing means may be automaticallycorrectly positioriedwith respect to the tooth to be trued, said settingmeans comprising a body angularl-y adjustable relative to saidframehaving a slot therein for the saw blade, an anvil'for supportingthe saw tooth during the setting thereof,- a cam for setting the toothand means automatically operated for locking the saw "blade duringthesettingo'f the-tooth. Y

14. A machine for automatically setting and truing the teeth of bandsaws or'th'e' likecorn prising aframe, settingmeans' mou'nted-onsai'dframe and fixedly positioned with respect-. to said frame duringoperation of the machine, means for supporting a saw blade, means forfeeding said saw blade step by step during each operational cycle of themachine so that the saw teeth are successively acted upon by'saidsetting means,

truing means acting upon said teeth afterthey have been set by saidsetting means, anabutmerit located adjacent said setting means, amovable member cooperating with said abutment'for locking the saw bladeduring the setting operation, said movable member having a helicalincline thereon, a cooperating helical incline fixed relative to saidfirst named helical incline, and means for rotating said movable elementat predetermined periods so that said movable member, due tothe'cooperating inclines, will cooperate with said abutment to lock saidsaw blade during the setting operation.

15. A machine for automatically setting and truing the teeth of bandsaws or the like comprisi g a frame, setting means mounted on saidframe-and fixedly-positioned with respect to said frame during operationofthe machine, means 7 1 6. A machine for automatically setting theteethof b'a-nd saws or'the like comprising a frame, setting m'eansmounted onsaid frame and fixedly positioned withrespect to said frameduring operation of the machine, means for supporting a saw blade,meansfor feeding said saw blade step by stepduring each operationalcycle of the machine so that the saw teeth are successively acted uponby said setting means, meansfor' moving said supporting means into andaway from the position in whichthe' setting operation is performed, saidlast named means comprising an articulated parallelogram movable at eachoperational cycle of-tlie machine. I

17. A machine for automatically setting the teeth of hand saws or thelike comprisinga frame, setting means mounted on said frame and fixedlypositioned with respect tosaid frame duringoperation of the machine,means for supporting a saw blade, means for feeding said saw blade stepby step during each operational cycle of the machine so that the sawteethare successively acted upon. by said setting means, means. for"moving saidsupporting; means intoand away from the position; in whichthe setting operation is performed, said last named means comprising anarticulated parallelogram, an oscillating shaft oscillated at eachoperational cycle of the machine and means connecting said oscillating,shaft with said articulated parallelogramso that said supporting. meansfor said blade is moved into and away from said setting means.

18; A machine for automatically setting the teeth of band: sawsorthe-like comprising a. frame, setting means mounted on said frame, meansfor supporting a saw blade, means for feeding said saw blade step bystep during each operational cycle of the machine so that the saw teethare successively acted upon by said setting means, means for lockingsaid saw blade during the setting operation, a driving shaft, a wormfixed on said driving shaft aspiral gear driven bysaid worm, a drummounted on one of the faces of 'said spiral gear, cam means 'upon saiddrum-controlling the unlocking-ofsaid locking means, a roller alsomounted on said drum controllingt'he lockingwof said locking means, anda second roller mounted upon the-other face of saidspiral gearcontrolling said'settin'g means.

193 A machine forautomatically setting. the teeth of bandisaws'on thelike comprising a frame, setting means mounted on: said frame andfixedly positioned with respect to said frame duringi operation of themachine, means for supporting a saw blade, means for feeding said sawblade step by step during eacl'r operational cycle of the; machine sothat the saw teeth are successively acted upon by-said setting means,means for moving said supporting means for said saw blade into and awayfromasaid setting means, a driving shaft,,a worm fixed onsaid drivingshaft, a gear driven by said worm, a cam driven by said gear, and meansoperated by said camlfor operating said means for moving: saidsupporting meansfor said saw blade.

20, A machine ,for automatically setting the teeth: of band saws or thelike comprising a frame, setting means mounted on said frame and fixedlypositioned with respect to'said frame during operation of themachine,,m'eans for moving a saw blade into and-awayfrom lsaid settingmeans, means for feeding said saw blade step by step during eachoperational cycle of the machine so that the saw teeth are successivelyacted upon. by said. setting, means, means for locking said saw bladeduring the setting. operation.v

ANDRE VIGNEAU.

; REFERENCES CITED,

- The following references are of record in the fileof this patent?UNITED I STATES PATENTS Knutson June 9;, 1942 Certificate of CorrectionPatent No. 2,528,925 November 7, 1950 ANDRE VIGNEAU It is herebycertified that error appears in the above numbered patent requiringcorrection as follows:

In the grant, line 15, strike out of SEVENTEEN years, same line, aftergrant insert until December 27,1964; in the heading to the printedspecification, between lines 7 and 8, insert the following: Section 1,Public Law 690, August 8, 1946. Patent ewpz'mes December 27', 1.964:

and that the said Letters Patent should be read as corrected above, sothat the same may conform to therecord of the case in the Patent Office.

Signed and sealed this 4th day of March, A. D. 1952.

[SEAL] i1 7 THOMAS F. MURPHY,

Assistant Commissioner of Patents.

